Frequency range (cm−1) | Frequency (cm−1) | Functional groups | ||
---|---|---|---|---|
DHCAa | Hexyl dihydrocaffeate | |||
3500–3200 | 3338 | 3502b, 3386 | O–H stretching | |
3000–2850 | 2925–2869 | 2917–2856 | C–H stretching | |
1760–1690 | 1668 | 1705 | C=O stretching | |
1600–1400 | 1525–1441 | 1608–1534 | C=C stretching | |
1320–1000 | 1207–1286 | 1192–1261 | C–O stretching | |
700 ± 20 | – | – | 728 | Long chain (C–H) |